[Bug 749444] [NEW] grub-legacy-ec2 cannot be purged

[iMac]

Public bug reported:

Binary package hint: cloud-init

Running current Maverick-Server as a Xen pv_ops domu.   Installed the
grub-legacy-ec2 package, and now it cannot be purged.  It does not
properly account for the pv_ops kernels (detected as non-domu) so it is
not much use to me to create a menu.lst for use with Debian Squeeze/6
Dom0 pygrub .   It removes the diversion of /usr/sbin/grub-set-default
and then trys to remove it again during the purge.. and fails.   So it
is stuck on my system in a "removed" state, with no dpkg --force options
to purge/workaround.

The following apt/dpkg output shows a reinstall followed by remove, and
purge. Note the purge fails.

root at ibm-main:/usr/sbin# apt-get install grub-legacy-ec2 --reinstall
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0B/28.4kB of archives.
After this operation, 0B of additional disk space will be used.
Preconfiguring packages ...
(Reading database ... 145664 files and directories currently installed.)
Preparing to replace grub-legacy-ec2 0.5.15-0ubuntu3 (using .../grub-legacy-ec2_0.5.15-0ubuntu3_all.deb) ...
Leaving 'diversion of /usr/sbin/grub-set-default to /usr/sbin/grub-set-default.real by grub-legacy-ec2'
Unpacking replacement grub-legacy-ec2 ...
Setting up grub-legacy-ec2 (0.5.15-0ubuntu3) ...
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Ignoring non-Xen Kernel on Xen domU host: vmlinuz-2.6.35-28-server
Updating /boot/grub/menu.lst ... done

root at ibm-main:/usr/sbin# apt-get remove grub-legacy-ec2 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  grub-legacy-ec2
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 160kB disk space will be freed.
Do you want to continue [Y/n]? 
(Reading database ... 145663 files and directories currently installed.)
Removing grub-legacy-ec2 ...
Removing 'diversion of /usr/sbin/grub-set-default to /usr/sbin/grub-set-default.real by grub-legacy-ec2'
root at ibm-main:/usr/sbin# apt-get remove --purge grub-legacy-ec2 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  grub-legacy-ec2*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? 
(Reading database ... 145656 files and directories currently installed.)
Removing grub-legacy-ec2 ...
Purging configuration files for grub-legacy-ec2 ...
No diversion 'diversion of /usr/sbin/grub-set-default to /usr/sbin/grub-set-default.real by grub-legacy-ec2', none removed.
dpkg: error processing grub-legacy-ec2 (--purge):
 subprocess installed post-removal script returned error exit status 128
Errors were encountered while processing:
 grub-legacy-ec2
E: Sub-process /usr/bin/dpkg returned an error code (1)
root at ibm-main:/usr/sbin# 
  
root at ibm-main:/usr/sbin# dpkg -l | grep grub
ii  grub-common                          1.98+20100804-5ubuntu3.1                          GRand Unified Bootloader, version 2 (common files)
pc  grub-legacy-ec2                      0.5.15-0ubuntu3                                   Handles update-grub for ec2 instances
ii  grub-pc                              1.98+20100804-5ubuntu3.1                          GRand Unified Bootloader, version 2 (PC/BIOS version)
root at ibm-main:/usr/sbin#

** Affects: cloud-init (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/749444

Title:
  grub-legacy-ec2 cannot be purged